@bashy In current version: no. The screenshot is created through PhantomJS. So Screeenly doesn't have your login cookies.
But this could be a feature in the distant future... But honestly, I don't have any idea how you could accomplish the login flow in PhantomJS.

@bashy@Graham
I think when Droplr changed their plans the last time, they also killed the API.

Screeenly and Droplr can not be compared together. Droplr is a client-software and lives in your menubar. Screeenly on the other side is just a API endpoint you can call in your own applications.
If you use the screeenly-client Package you can do something like this:

This can be handy if you have a dashboard of pages you created (like a portfolio or a company internal application).
Maybe the punchline on the landingpage is a bit unclear. Will probably change that to something more descriptive.

I don't know if this forum is the right place, but I would like to share a Laravel application I recently built.

Screeenly helps you create screenshots from websites, so you can use them in your own application.
Thanks to Jeffrey I learned a ton about PHP and OOP and I used Screeenly as a learning project to apply some of the techniques and patterns. It's for sure not THE best code of mine, but when Laravel 5 will be released, I will probably rebuilt the application, so I can use all the new awesome L5 stuff.
I open sourced it because I didn't find nearly no Laravel application on Github and I wanted to share, how I structure my code. Maybe this is a inspiration to others ;)

There is also a composer package which works great with Laravel 4, so you don't have to struggle with the API itself. Maybe this is something for you.